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Finding the Fourth Proportional to 122,863.54, 169,510.77 and 100,163.40

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Solution

The fourth proportional to 122,863.54, 169,510.77 and 100,163.40 is: 138,192.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,863.54 : 169,510.77 = 100,163.40 : x
  2. Step 2: Convert to fraction form
    122,863.54/169,510.77 = 100,163.40/x
  3. Step 3: Cross multiply
    122,863.54x = 169,510.77 × 100,163.40
  4. Step 4: Simplify right side
    122,863.54x = 16,978,775,059.82
  5. Step 5: Solve for x
    x = 16,978,775,059.82/122,863.54
  6. Step 6: Final answer
    x = 138,192.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.